@media screen and (max-width:992px) and (min-width:768px) {
    main section {
        width: 720px;
        height: 527.8px;
    }
    main section .con {
        height: 337.6px;
        flex-direction: row;
    }
    main section .con .commin {
        width: 136px;
    }
    header .wrap {
        width: 720px;
        padding: 0;
    }
    header .wrap .nav a:last-of-type {
        display: none;
    }
    .slideshow {
        height: 434px;
    }
    .grade-main {
        width: 157.5px;
    }
    .grade-main .grade-top {
        font-size: 50px;
    }
    .guli-con .guli-main {
        width: 220px;
    }
    .news-main {
        width: 345px;
    }
    .news-main .news-txt {
        width: 201px;
    }
    .client section {
        height: 527.8px;
    }
    .about section {
        width: 750px;
    }
    .about-con img {
        width: 94px;
        height: 94px;
    }
    .about-con p {
        width: 94px;
        font-size: 12px;
    }
    .about-con .about-common {
        font-size: 22px;
    }
}